Explosive-engine attachment foe



E. S. CALENO.-

EXPLOSIVE ENGINE ATTACHMENT FOR BICYCLES. APPLICATION FILED JUNE17.1919.

1,317,154. Patented Se t. 30, 1919.

5114 uewfoz ERNEST S. CALENO, OF MONTGOMERY COUNTY, NEAR DAYTON, OHIO.

EXPLOSIVE-ENGTNE ATTACHMENT FOR BICYCLES.

Specification of Letters Patent.

Patented Sept. 30, 1919.

Application filed June 17, 1919. Serial No. 304,951.

To all whom it may concern:

Be it known that I, ERNEST S. OApE vo, a subject of the King of England,residing in the county of Montgomery, near the city of Dayton, State ofOhio, have invented cer tain new and useful Improvements inExplosive-Engine Attachments for Bicycles,of which the following isaspecification The principal object of my invention 1s to provide for abicycle, an explosive-motor attachment that is cheaply, efficiently andlightly constructed, and one whlch may be conveniently and compactlycarried on the rear portion of the machine. The device isself-contained, and its weight is materially less than that of manyother types of motors employed for the purpose of propelling a bicycle.

Other important and incidental ob ects will be brought out in thefollowing specification, and particularly set forth in the subjoinedclaims.

One form of embodiment of my invention is illustrated in theaccompanying drawings, of which Figure 1 is a side elevational view,partly in section, of my improved explosive-engine attachment on therear portion of a bicycle. And Fig. 2 is a top plan view of the same,with the gasolene tank and luggage carrier removed.

Throughout the specification and drawings, similar reference charactersdenote corresponding parts. v

Referring to the accompanying drawings, the numeral 1 designates therear wheel of a bicycle, and 2 the inclined bracing stay of the rearportion of the frame 3 that supports the seat 1. The numeral 5designates a vertical support for a horizontal member 6 that is commonlyused on bicycles to receive a luggage carrier. At its front end thehorizontal member 6 is suitably secured to the stay 2.

Bolted to the horizontal member 6, preferably near its middle portion,is the foot portion 7 of a flange 8 on a horizontally disposed cylindercasting 9. To the latter is secured a similar horizontally-disposedcylinder casting 10 having a flange 11 that is bolted to the flange 8,and a foot portion 12 that is bolted to the horizontal support 6.

Each horizontal cylinder casting terminates at one end in asemi-circular portion. These semi-circular portions, when boltedtogether as shown in the drawings, form a housing for the web portionsof a crank shaft 13. Horizontally movable in the bore of each casting isa piston 14 to which is pivotally secured a connecting rod 15 that is inturn connected to the crank shaft 13. Inserted in the head of eachcylinder casting is a spark plug 16 connected by a Wire 17 to a magneto18 preferably carried on the left side of the motor. (See Fig. 2). Themotor, as illustrated, is of the two-cycle type, the explosive mixturebeing drawn into each cylinder through an inletport 19 and exhaustedthrough a port 20.

The flanges 8" and 11 terminate at their top portions in right-angledextensions 21 whose upper surfaces are flush with each other to form asupport for a horizontal fuel tank 22, th latter being firmly bolted tosaid extensions and adapted o support a luggage rack 23. The fuel tank22 is preferably elongated in shape, not only to support the luggagerack, but to cooperate with the cylinder sections in making a balancedand compact driving unit for the bicycle.

When the casting sections 9 and 10 are bolted together as shown anddescribed, and the fuel tank 22 bolted to the extensions 21', there isprovided a compact and unitary driving structure for the bicycle, whoserear wheel 1 is driven as follows. East on the outer end of the crankshaft 13, on the right side of the machine, is

a driving pulley 23. Around the latter passes a cable 24 which in turnpasses around a large pulley 25 secured to the spokes 26 of the rearwheel 1, by which it is driven from the motor unit just described.

It will thus be seen that I have provided a prime mover for a bicycle,that comprises few parts which may be conveniently and compactlyassembled. Each cylinder and its flange portions are cast in one piece,and bolted against each other to provide a compact and balanced enginethat supports above it, in small space, the fuel tank therefor. Theentire structure is carried by the horizontal support 6 above the rearwheel of the bicycle. My invention reduces the weight of the motorconstruction to the minimum without sacrificing e'fficiency, anddecreases its cost materially.

Having described my invention, I claim:

1. In a device of the type described, the

combination with a bicycle, of a horizontal supporting-inember securedto said bicycle above its rear wheel, a horizontally-disposed it, saidflange at its lower end secured to said horizontal support, and ahorizontal fuel tank mounted on the upwardly projecting portion of'saidflange. 1

2. In a device of the type described, the combination with a bicycle, ofa horizontal supporting-member secured tosaid bicycle above its rearwheel, a pair of oppositely disposed cylinder castings, each of whichterminates at its inner end in an upwardly and downwardlyextendingflange, means for securing said flanges together, right-angled footportions on the lower ends of said flanges, secured to said horizontalsupporting-member, and a horizontal fuel tank supported by the topportions of said flanges.

3. In a device of the type described, the

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

7 Witness:

lower horizontal extensions being in alinement for securement to saidhorizontal supporting member, and a horizontal fuel tank secured totheupper horizontal eXtensions of said fianges.-

In witness whereof I have hereunto set my hand this 16th day of June,1919.

ERNEST S. CALENO.

HOWARD S. SMITH.

Washington; 1). 0-7

